Air-control device for the air-inlets of carbureters



H. CORY.

AIR CONTROL DEVICE FOR THE AIR iNLETS 0F CARBURETERS.

APPLICATION FILED AUG- 1916.

' Patented J M16 15, 1920.

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UNITED STATES PATENT OFFHGE.

HARVEY CORY, OF LONG BEACH, CALIFORNIA, ASSIGNOR TO EUGENE F. KLINE, OF

LOS ANGELES, CALIFORNIA.

AIR-CONTROL DEVICE FOR THE AIR-INLETS OF CARBURETEBS.

Specification of Letters Patent. Patented J une ,15 1920 Application filed August 1, 1916. Serial No. 112,545.

To all whom it may concern Be it known that I, HARVEY CORY, a citizen of the United States, residing at Long Beach, in the county of Los Angeles and State of California, have invented new and useful Improvements in Air-Control Devices for the Air-Inlets of Carburetors, of which the following is a specification.

- This invention relates to an-air control for carburetors and particularly pertains to a device adapted to be mounted over the air inlet opening of a carbureter to regulate the volume of air passing therethrough.

It is an obj ect of this invention to provide an automatic air control for regulating the inflow of air to a carbureter and which will act in an automatic manner to govern the ratio of air and fuel which combines within the carbureting chamber to form the gaseous fuel used by the engine.

Another object of this invention is to provide means for allowing a rich fuel mixture to be carbureted upon the initial rotation of the engine shaft and to automatically change the ratio of fuel and air to decrease its richness as the engine speed increases.

It is another object to provide an air control governor which will operate throughout any of its positions irrespective of the horizontal inclination of a vehicle upon which it is used.

1 Another object is to provide an air governor which will permit air to flow to the carbureting chamber along the most advantageous path of travel to properly mix it with the fuel in the carbureting chamber.

Another object is to provide a control member which is gravitally operated and which will at all times divert the inflowing air to the floor of the carbureting chamber.

Another object is to rovide an air control for carbureters Wl'llCh will act to conserve the amount of fuel used and which will require less effort in starting the engine than is now required by most cars.

It is a further object to provide an air inlet control which is decidedly simple in its construction, has but one moving art devoid of wear and may be readily positioned upon the carburetor Without alteration of the oarbureter part.

Other objects will appear hereinafter. This invention is illustrated, by way of 'wall at the outer end of whi secured, upon a horizontally mounted pivot example, in the accompanying drawings in which:

Figure 1 is a View in section and elevation with parts broken away to illustrate the air control and its application to a carbureter of common construction which is here shown as mounted upon an engine manifold.

Flg. 2 is an enlarged view in side elevation illustrating the control device.

Fig. 3 is a view in end elevation as seen on the line 3-3 of Fig. 2 viewed in the direction of the arrows and illustrates the rectangular formation of the controller case.

Referrin to the drawings more particularly, 10 indicates the manifold of an internal combustion engine upon the lower end of which is communicatively secured a carbureter 11. The carbureter as here shown is of the Holley type and is formed with a carbureting chamber 12 to which a liquid fuel is fed through an opening 13 which is controlled by a needle valve 14. A

bafile plate 15 extends vertically downward within the chamber and restricts the flow of air from an inlet pipe 16 to a passa e 17 at the edge of the chamber. A butter y Valve 18 is provided to control the inflow of air from the inlet 16, this however is unnecessary in the present invention and may be dispensed with without impairing the'action of the carbureter. A carburetor here shown and described may be varied in its construction or other types of carbureters may be substituted therefor without departing from the spirit of the present invention, as this invention is concerned with an automatic air control device 19 adapted to be suitably positioned over the end of the air inlet sa e 16. I

he air control device is composed of a clamping member 20 adapted to encompass the outer end of the air inlet passage and to be clamped thereupon by means of a clamping screw 21 which acts to draw a pair of cars 22 together with a clamping action.

Suitably secured upon the outer end of the clamping member 20 is a rectangular housing 22 which is formed with thin metallic is pivotally pin 23, a swinging valve member 24. The valve member 24 is of a width to snugly fit between the side walls of the housing, and

of a radial length to swing free of the bottom wall of the housing at the same time allowing a passageway 26 beneath the valve member and this lower wall. The valve is formed of some metal having high specific gravity, preferably lead, and is shaped with an arcuate horizontal face adapted to provide an opening between the valve and the lower wall of constant width. The opposite faces of the valve are arcuately formed and are concaved toward each other. A bumper 25 is secured against the upper horizontal wall of the housing and in proper position to be encountered by the valve as it swin s upwardly. This member is preferably ormed of rubber or felt and will thus absorb the sound produced by the vibration of the valve against the wall.

This control device may be readily applied to the air inlet of a carbureter by passing the clamping member 20 over the outwardly extending cylindrical end of the carbureter air passage 16, after which it is secured by tightening the clamping screw 21. It is essential that the valve be horizontally pivoted, this however is the only adjustment which need be carefully made. When the control device is so mounted upon the carbureter it is ready to cooperate therewith to provide a gaseous fuel. The engine is initially started by some preferred cranking operation, and due to the slow speed at which the engine pistons will travel upon starting, the suction through the carbureter will be very small. This condition makes it impossible for the engine to draw suflicient gaseous fuel into its cylinders to afford them with proper combustion without some means of increasing the richness of the fuel.. This is done by the present device in an automatic manner and without the regulation of the butterfly valve 18. It will be noted that normally the valve member 24 will be vertically suspended and will thus permit a small amount of air to pass beneath it and through an opening 25 after which it will be drawn by suction along the lower wall. of the inlet passage through the passageway 17 and will thereafter be drawn across the surface of the fuel in the carbureting chamber, this will insure that a mixture of considerable richness will be carbureted and delivered to the engine cylinders where it will be immediately fired. This arrangement will act as a primer and it is obvious that the considerable gas which is otherwise eventually wasted is saved. After the engine is started, the suction produced therein will act to draw the valve 2-1 inwardly and cause it to assume a horizontal position with its inner edge bearing against the bumper 25. When the valve is in this position it will have opened aport of sufficient area to supply the carbureter with all the air required when running at high speed. As the speed of the engine decreases the weight of the valve 24 will cause it to assume its normal vertical position and will act directly and automatically to govern the proportional parts of air and fuel enteringinto the mixture of gaseous fuel, said action being in direct ratio to the speed of the engine. The width of the arcuate end of the valve 24 is suflicient to maintain the space 26 of a uniform width irrespective of the inclination of the vehicle and will thus allow the vehicle to be readily started when either on level or on inclined surfaces. directed to the fact that the concave arcuate surface of the valve acts at all times to deflect the air downwardly and over the surface of the fuel within the carbureted chamber.

It will thus be seen that the air control here provided is simple in its operation, may be easily applied and when operating, acts in a positive and automatic manner to regulate the proportional parts of air and fuel combined within the carbureter and to insure that they are regulated in direct ratio to the speed of the engine.

I claim: 1. An air control valve for carbureters, comprising a rectangular housing, a clamping ring by which it is detachably secured to,

comprising a valve housing having a rectangular passageway at one end thereof, and a weighted valve member suspended across the rectangular passageway for free vertical swinging movement; said valve member having a cylindrical portion surrounding its pivotal mounting and adapted to close the space between the mounting and the top of the opening, and an arcuate lower face concentric with the pivotal axis of the member and adapted to swing above the lower straight wall of the passageway; said face being of sufficient length to allow the housing to be disposed at various angles to the vertical without impairing the operation of the valve.

In testimony whereof I have signed my name to this specification.

HARVEY CORY.

Attention is further 

